hmmm, this will be a long post
good to use....any thing thats not the standard struts, sunny struts or stanza one
so you have
80mm bolt spacing: 180b 240k (old caliper)
3.5 inch/88.9mm bolt spacing: 200b 240k(small offset) 240k (big offset)
3.5 inch/88.9mm thread into caliper: bluebird r31 s12
180b/ 240k with dodgy sunny like calipers, use commo caliper and 276mm rotor
or volvo 4 pot crappy arse caliper and unknown disc
200b/240k(small offset)
twin piston sumitomo calipers and standard disc(i think the 240ks had these calipers standard...same as 240z caliper or corona twin piston or gemini i think)
or
landcruiser 4 pot caliper with s13 disc or camry disc or legend disc, all 250 something mm discs
240k struts (large offset)
these have a 270mm disc standard with i think the twin piston calipers
but can use later hilux 4 pot calipers with verada 276mm discs
bluebird/r31/s12
pretty sure s12 and r31 struts are the same thing, bluebird ones have longer shocks and different stub axle angle(more camber less wheel clearance)
use standard r31 brakes, single piston caliper and 250x22mm disc
or go to datsport and but there caliper adaptor and use r32 brakes
280zx struts
never had any experience with them, i think they are similar to the r31 struts ????
they have single piston caliper with 250x18mm disc
but the main difference is that these still use the bigger z car hub, 81mm bore in the disc instead of 73mm
and thats the quick not very detailed version